Jessica Biel & Justin Timberlake's Baby Son Silas' Favorit Song Is... 

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Jessica Biel & Justin Timberlake\'s Baby Son Silas\' Favorite Song Is...

by Marc Malkin Fri., Aug. 28, 2015 5:00 PM PDT

You\'d think Justin Timberlake was singing to his new baby son Silas all the time, but that\'s not the case.

Jessica Biel says her music superstar husband prefers to leave work at the office. "You know, it\'s hard when it\'s your business," she told me exclusively at the Bare party at RonRobinson Santa MonicaYou don\'t always bring it home and use that as your casual time."

Turns out it\'s Biel is the who is providing the tunes. "I sing to the baby, poor thing," the new mom cracked. "I do a lot of \'Somewhere Over the Rainbow.\'"

song\'s impressive notes? "Sometimes," Biel said. "Depending on what time in the morning it is."

WATCH: Jessica Biel reveals the "most magical" thing about motherhood

Aside from the family, Biel is also expanding her career. "I just produced a film that I was working on for about eight years. We finally made it happen," she said, adding, "It\'s call

. It\'s a very tiny independent film and hopefully we will get some distribution and get it out there."

The film is about "grief and overcoming tragedy," Biel explained. Jason Sudeikis plays a man who strikes up a friend ship with a homeless girl played by

\' Maisie Williams. The cast also includes Mary Steenburgen, Orlando Bloom, Paul Reiser and

in 2010, she said she\'s interested in working on a full-length feature.

"I think I would need to write it or somehow be involved with that process…It\'s a huge commitment," she said. "It\'s a lot of work."

She and Timberlake will receive the Inspiration Award from GLESN in October at the Respect Awards, which honor people and corporations who have had an impact on LGBT youth. Biel said, "It\'s a really big issue and a real problem and you just have to stand up for people."

Does Justin Timberlake Sing to His Baby Boy?

TAGS/ Jessica Biel, Justin Timberlake, Babies, Music, Marc Malkin, Top Stories, Exclusives

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